Other cues including the IoU score and confidence score are also utilized in the testing stage for tracking paired instances across frames, following [1]}.
For each newly-detected instance \(i\) , let \(f_{i}\) , \(b_{i}\) , and \(c_{i}\)  denote its tracking embedding, bounding box, and confidence score, respectively.
For instance \(j\)  in the tracking queue with tracking embedding \(f_{j}\)  and bounding box \(b_{j}\) , we can obtain the similarity score of the instances \(i\)  and \(j\)  by
\(\begin{split}Final Score(i,j) \ = \ \alpha Score(f_{i} ,f_{j}) + \beta IoU(b_{i} ,b_{j}) + \gamma c_{i} \ ,\end{split}\) 
